| 施工爆破对确定海底隧道最小岩石覆盖厚度的影响研究 |
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| 引用本文： | 王汉鹏,李术才,乔 玲.施工爆破对确定海底隧道最小岩石覆盖厚度的影响研究[J].岩土力学,2006,27(Z1):290-295. |
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| 作者姓名： | 王汉鹏 李术才 乔 玲 |
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| 作者单位： | 1. 山东大学 岩土与结构研究中心，济南 250061；2. 山东章丘地矿局，章丘 250200 |
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| 基金项目： | 国家自然科学基金委联合基金重点项目（No. 50539080） |
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| 摘 要： | 确定海底隧道的最小岩石覆盖厚度是在确保海底隧道安全的基础上减少工程造价的关键。施工爆破对上覆岩石的振动影响着海底隧道最小岩石覆盖厚度的确定。采用FLAC3D模拟了宁波海底隧道钻爆法施工对上覆岩层的动力学影响，分析了海底隧道的底板标高和装药量对上覆岩层交界面的稳定性影响，得到了振动速度、应力波动历时曲线和塑性区大小。通过与萨道夫斯基公式计算结果的对比，综合经济、安全方面的考虑，建议降低装药量，底板线下降2 m。
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| 关 键 词： | 海底隧道 最小岩石覆盖厚度 钻爆法施工 动力学 FLAC3D 数值模拟 |
| 收稿时间： | 2006-04-15 |
Dynamic research on the minimum rock covers of subsea tunnel construction using drilling and blasting method |
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| WANG Han-peng,LI Shu-cai,QIAO Ling.Dynamic research on the minimum rock covers of subsea tunnel construction using drilling and blasting method[J].Rock and Soil Mechanics,2006,27(Z1):290-295. |
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| Authors: | WANG Han-peng LI Shu-cai QIAO Ling |
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| Institution: | 1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China；
2. Bureau of Geo. Minerals, Zhangqiu City, Zhangqiu 250200, China |
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| Abstract: | Ascertaining the minimum rock covers of subsea tunnel is important to reduce project cost on the conditions of subsea tunnel safety. Researching the dynamic influence of tunnel blasting construction on the cover rock mass is necessary to the minimum rock covers. The effect of subsea tunnel construction using drilling and blasting method to overlaying strata is analyzed through FLAC3D numerical simulation. The influence of different subsea tunnel level and charge weight on the interface of overlaying strata is analyzed. The blasting vibration velocity history and stress vibration history at key points and the plastic zone are gained and contrasted with the result of experimental formula; synthesizing the above analysis and considering economical and safety of subsea tunnel, we suggest that charge weight should be reduced and subsea tunnel level should be descended 2 meters. |
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| Keywords: | subsea tunnel minimum rock covers drilling and blasting construction dynamics FLAC3D numerical simulation |
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